تأثير توليفة السماد الحيوي و الدودي و الكيميائي في جاهزية النتروجين و الفسفور و البوتاسيوم في التربة و تراكيزهما في نبات الكتان inum Usitatissimum L

الملخص EN

A pot experiment was carried out in the field of the college of Agricultural Engineering sciences-university of Baghdad/AL-Jadiriya for the winter season 2018-2019 using silty loam soil (10 kg per pot) to study the effect of biofertilizer comibination ((Azotobacter chroccoccum + Bacillus mucilaginosus+ Glomus mosseae), vermicompost, locally compost and without compost and different levels(zero% , 50% and 75% ) of the recommendation of chemical fertilizer on the availability of Nitrogen, phosphorus and potassium in soil and the concentrations of these nutrients in shoot of Flax and compare these with the total (100% ) of chemical fertilization recommendation as control treatment, Results showed significant effect of Biofertilizer combination in increasing Nitrogen, phosphorus and potassium availability with the value 43.78 mg N kg-1 soil, 4.32 mg P kg-1 soil and 231.3 mg K kg-1 soil respectively, Biofertilizer affect significantly also in increasing concentration of Nitrogen, phosphorus and potassium with the value 2, 42% , 0.31% and 3.05% respectively, on the other hand results of compost addition showed significant effect in the concentration of NPK in shoot flax, the locally compost treatment gave the superiority with Nitrogen concentration 2.65% compare with control treatment 2.13% while the vermicompost treatment significantly increase the concentration of phosphorus and potassium with the value 0.31% and 3.09% compare with control treatment value 0.26% Results showed the significant effect of chemical fertilizers levels on phosphorus and potassium concentration in shoot plant, the addition of 75% of chemical recom-mendation gave 0.33% and 3.14% for phosphorus, potassium respectively compare with the control treatment which were 0.25% and 2.54% respectively, the addition of biofertilizer with locally compost increase the concentration of Nitrogen in shoot plant to 2.52% compare with control treatment that gave 1.97% while the treatment of biofertilizer with vermicompoct cause to increase phosphorus and potassium concentration in plant to 0.35% and 3.25% respectively, the statistics analysis results showed the significant effect for the interaction between biofertilizer and compost or biofertilizer and chemical fertilizer or chemical fertilizer and compost in its effect on increasing Nitrogen, phosphorus and potassium in plant, the addition of vermicompost cause to increase the availability of Nitrogen, phosphorus and potassium in soil that gave the value 45.22 mg N kg-1 soil, 4.44 mg P kg-1 soil and 235.2 mg K kg-1 soil respectively and the addition of 75% of chemical fertilizer recomindation also increase the availability of these nutrients in the same trend, the triple interaction results showed the significant superiority of the treatment biofertilizer with vermicompost and 75% of chemical fertilizer recommendation over all other interaction treatment in increasing the availability of Nitrogen, phosphorus and potassium in soil that gave the value 57 mg Nkg-1 soil, 6.13 mg Pkg-1 soil and 260.6 mg Kkg-1 soil respectively while the total (100% ) chemical fertilizer recommendation gave 56 mg Nkg-1 soil, 2.66 mg Pkg-1 soil and 292.9 mg Kkg-1 soil respectively.